Baseline Documents

PACS SVR 22/23 June 2006

FM IST 1

PACS FM Tests at

Integrated Satellite Level

H. Feuchtgruber

with inputs from the PACS Operations Team:D. Cesarsky, H. Dannerbauer, T. Müller, P. Royer, B. Vandenbussche, R. Vavrek


FM IST 2

Baseline Documents • IID-A & IID-B

• HP-2-ASED-PL-0031, Issue 2, 3-Sep-04, “Instrument Testing on PLM PFM and Satellite Level”• HP-2-ASED-TN-0115, Issue 1, 1-Feb-05, “Thermal Environment for Instrument Testing on Ground”• SCI-PT-12759, issue 3, 2-Jun-04, “Reference Mission Scenario”

• Set of Straylight related documentation

• PACS-ME-TP-021, Issue 1.1, 6-Sep-05, “PACS Integrated Module Test Procedure”• PACS-ME-TP-017, Issue 1.3, 17-Nov-05, “PACS Short Functional Test Warm & Cold” • PACS-ME-TP-016, Issue 1.3, 19-May-05, “Test Procedure for PACS WE Tests with PACS EGSE and CCS”


FM IST 3

FM Test Flow

Contains IST3


FM IST 4


FM IST 5

IST relevant changes EQM PFM

• Power supplies are flight standard (in-rush current, consumption) • Redundancy (increased test volume) • Complete Ge:Ga and Bolometer detector arrays, new generation of FEEs (increased number of commands longer test durations)• Detector Heater & Flasher for Ge:Ga Curing (additional tests) • Larger grating angle range (slightly longer test durations)• Larger chopper angle range (slightly longer test durations)• Filter wheel SPEC (additional tests, longer test durations)

• New generation of OBSW for DPU, SPU-S, SPU-L and DMC• New DPU boot software• New MIB (new commands, changed HK packet contents, x2 for redundancy)

• Lessons learnt: - improved background measurements- improved thermal behaviour tests- general test script adaptations


FM IST 6

IST Relation to ILT & Commissioning • At present: The starting point for all test definitions are the

activities carried out during PACS CQM ILT and EQM IMT.• Changes to the EQM IMT program are due to FM

hardware/software differences and lessons learnt.• The final versions of the tests will be for the first time run in

FM ILT:(1) SFT warm, HeI, HeII(2) FFT, SPT-SPEC, SPT-PHOT(3) AOT tests(4) Redundant PACS instrument performances (as far as time

allows)(5) Parallel mode: PACS part only(6) PACS ILT specific test/calibration programme (ILT only)

• Activities (1)-(5) to be carried out at all test phases (ILT, IST1, TV/TB, IST2, IST3) and finally in flight. The test sequences will allow to judge about the health of the instrument and its sub-systems and whether ILT functional performances are preserved (i.e. we do not attempt to make absolute measurements, but only relative ones)


FM IST 7

Differences and Notes with respect to ILT

• During ILT we will not run the test via a MTL (we may encounterTC timing or synchronisation problems)

• All provided test durations hereafter are expressed as execution time in the terminology of CUS “modes” (not “obs” !!)

• From EQM IMT experience we need to take into account also (TBD) overheads.

• Running a test entirely from the MTL will require some more thoughts on how to arrange for a suitable “near real time analysis” (if any ?)

and properly tested command sequences.

• We have to learn how to handle (i.e. process and analyse) a SSMM dump


FM IST 8

Top Level Structure of IST • UFT: Basic warm electronics test prior to connection to the

FPU • SFT warm, HeI and HeII: Basic verification of all PACS

subsystems after each significant integration/handling step. • IST Commissioning: “This sequence shall verify the ability to the instrument

commissioning and performance verification operations” • IST Reference Mission Scenario: “The objective of this sequence is to exercise 48h of representative

operations, including the non visibility phase. This especially comprises the scientific instrument operations.”

• IST Special Performance Test: “Comprises all remaining test.”• EMC Tests: Conducted Emission (most noisy mode),

Radiated Emission (most noisy mode), Radiated Susceptibility (most sensitive mode)

• TV/TB Tests: Reduced IST test program• PACS/SPIRE parallel mode tests: part of IST Commisioning


FM IST 9

FM IST Cryostat Environment

T101 T102

E201

P501

SV521

V503V501

S501

N511 N512

V103

V106

T112T111

P101SV123

H101 H102

H103 H104

A101 - A1XX

PPS111

RD124

E421 E441 E461

HTT

HOT

CVV

HS1 HS3

SV922

S101

N513

V504

T702, 703

T106,107

H502/H503

Legend: A: adsorberE: heat exchangerH: heaterHS: heat shield L: liquid level probeN: exhaust nozzleP: pressure sensorPPS: passive phase separatorRD: rupture discS: filterSV: safety valveT: temperature sensorV: valveVG: vacuum gauge

SV723

RD724

P701

SV921

T501

T504T506

HS2

SV121

E601

Filling port

OBA

T105 T104

V505

V506

T507

T505

L101

L701

T701, 704

L702

L102

T103

H701 H702

V105V701

V104

V102

V702

VG901

VG902

H501

T502

V502

Non-CCU components

P502

Closed !(drifting)

Tilt may affect Red Ge:Ga strap

Full


FM IST 10

FM TV/TB Cryostat Environment

T101 T102

E201

P501

SV521

V503V501

S501

N511 N512

V103

V106

T112T111

P101SV123

H101 H102

H103 H104

A101 - A1XX

PPS111

RD124

E421 E441 E461

HTT

HOT

CVV

HS1 HS3

SV922

S101

N513

V504

T702, 703

T106,107

H502/H503


SV723

RD724

P701

SV921

T501

T504T506

HS2

SV121

E601

Filling port

OBA

T105 T104

V505

V506

T507

T505

L101

L701

T701, 704

L702

L102

T103

H701 H702

V105V701

V104

V102

V702

VG901

VG902

H501

T502

V502

Non-CCU components

P502

Empty Tilt may affect Red Ge:Ga strap


FM IST 11

In-Flight Cryostat Environment

T101 T102

E201

P501

SV521

V503V501

S501

N511 N512

V103

V106

T112T111

P101SV123

H101 H102

H103 H104

A101 - A1XX

PPS111

RD124

E421 E441 E461

HTT

HOT

CVV

HS1 HS3

SV922

S101

N513

V504

T702, 703

T106,107

H502/H503


SV723

RD724

P701

SV921

T501

T504T506

HS2

SV121

E601

Filling port

OBA

T105 T104

V505

V506

T507

T505

L101

L701

T701, 704

L702

L102

T103

H701 H702

V105V701

V104

V102

V702

VG901

VG902

H501

T502

V502

Non-CCU components

P502

Empty


FM IST 12

Overview of PACS Unit Functional Tests

• Configuration:- PACS warm electronics mounted SVM panel

- WIH connected - Electrical checks done as part of the integration procedure (a) with I-EGSE (28V power, CDMS sim., OBT sim.) (b) with CCS

• Test procedure PACS-ME-TP-016, issue 1.4: - Switch-on - Simulated Spectroscopy mode (DMC ramp simulation) - Simulated Photometry mode (BOLC test pattern) - Switch-off


FM IST 13

Overview of PACS Short Functional Tests• SFT warm, HeI, He II (nominal) : Duration ~1.2h each

• SFT warm, HeI, HeII (redundant) : Duration ~1.2h each

Contents: (differences warm - HeI - HeII just in some parameter values)

- Switch-on ( = OFF – SAFE transition)- Basic chopper moves- Optional launch-lock open / close steps- Open loop / closed loop simple grating moves- Calibration sources, simple check (no stabilisation)- Heater/Flashers: simple check of currents (new)- Filter wheel Phot: 3 full turns- Filter wheel Spec: 3 full turns- T- Sensors: plausibility check- Ge:Ga detector chain: mainly dummy resistor check- Cooler: check if heater currents can be applied (T-

response)- Bolometer detector chain: bias staircase pattern- Switch-off


FM IST 14

IST Commissioning: PACS• Full Functional Test (FFT) at HeII conditions: total time: ~10.6h Contents: - Switch-on (OFF – SAFE Transition) 0.1h

- Memory Management Test 0.1h

- SetupSpectroscopyCSoff (+Llock open)0.3h

- Grating Test 0.2h - Thermal behaviour SPEC ~1.5h- Ge:Ga heater

0.3h- Ge:Ga flasher

0.25h- SetupSpectroscopy, FW SPEC, data rates ~2h? <

and background adjustment - Chopper full FoV move

0.3h- Medium sampling grating scan (2 filters)

1.0h- Cooler recycling 2.2h- Thermal behaviour PHOT ~1.5h- SetupPhotometry, FW PHOT, data rates 0.6h- Bolometers saturation check

0.1h- Switch-off

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FM IST 15

IST Commissioning: PACS/SPIRE Parallel

• Repeat same procedure as for EQM IMT (PACS-ME-TP-024, issue 1.2, 3-Nov-05)• Total execution time: ~6.75 h Content (PACS part): - Shifted cooler recycling - Setup photometry - Single band photometry AOT (red channel only) - Dual band photometry AOT (red + double reduced blue channel)

Status of scripts and procedure for IST:- SPIRE part requires slight updates- PACS part requires slight updates- No simultaneous CUS scripts possible yet!, but …

• Precise definition of parallel mode as “4th Instrument” in progress


FM IST 16

IST Reference Mission Scenario: PACS

•


FM IST 17

IST Special Performance Test: PACS• SPT at HeII, SPEC: total time: ~8.4hContents: - Ge:Ga dark currents on internal CSs (cold)0.65h

- Grating performance test (full diagnostic 0.55h monitoring, exploration of stepping performances on full accessible range)- Chopper performance test (duty cycle at 0.2h different frequencies, OBCP sync.)- Emissivity of internal CSs (2.3)0.75h- Quick Wavelength check 0.3h- Grating RSRF

3.1h- S/N as function of reset interval 0.25h- Different bias settings for Ge:Ga detectors

0.3h- Test of internal calibration recipes SPEC

(0.65)0h- Time constants for flux changes spectroscopy

0.5h- Internal CSs performance test

1.1h- Detector selection table test SPEC 0.3h - SPU compression/reduction test 0.25h

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FM IST 18

IST Special Performance Test: PACS• SPT at HeII, PHOT: total time: ~6.7h

Contents: - Cooler recycling 2.2h ?- SetupPhotometry 0.6h- Test of internal calibration recipes PHOT 0.6h- Focal plane map with CSs and representative

(0.2)0.7h background (updated see HP-2-ASED-SD-0064)- Staring measurement on CS for low

1.5h frequency noise- Time constants for flux changes photometry

0.5h- Detector selection table test PHOT

0.1h - SPU compression/reduction test PHOT

0.25h - Test pattern photometry 0.1h

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FM IST 19

IST Special Performance Test: PACS• AOT Tests: (redefined based on lessons learnt + curing; some

analysis still ongoing; total time: ~8.2h)Contents: - Switch-on 0.1h

- Cooler recycling 2.2h- SetupPhotometry 0.6h- “TuttiFrutti” AOT test PHOT

0.5h- PHOT AOT concepts (based on lessons ~1.0h learnt: EQM IMT, FM ILT)- Enter SAFE mode 0.1h - SetupSpectroscopy 0.6h- “TuttiFrutti” AOT test SPEC 0.5h

- SPEC AOT concepts (based on lessons ~2.0h

learnt: EQM IMT, FM ILT) - Ge:Ga detector curing procedure 0.5h- Enter SAFE mode 0.1h- Switch off


FM IST 20

IST Special Performance Test: PACS• Test of redundant PACS instrument: (new for FM)

• Ideally many FFT/SPT tests would require repetition with redundant hardware. The concept below is a compromise to save time. ( Only during ILT an attempt will be made to properly characterize redundant hardware functional performances.) Total time: ~4.8h

Proposal: - Switch-on (redundant)0.1h

- Cooler recycling 2.2h- SetupPhotometry (other controller params !)

0.6h- Two/Three position chopping w/wo CSs 0.5h- Enter SAFE mode 0.1h- SetupSpectroscopy (other controller params!)

0.6h - Line Scan AOT with variation of internal 0.6h

calibration concept- Enter SAFE mode 0.1h- Switch off (redundant)


FM IST 21

PACS EMC Testing during IST• PACS-ME-PL-015, issue 1.2, 10-Nov-04, EMC/ESD Control Plan and Procedure:

- Contains description of “most noisy” modes (for CE and RE)

- Scripts have been written for similar overall strategy as for RS-

Tests: a) configure for SPEC mode b) configure “most noisy” mode c) execute measurements

• PACS-ME-TP-021, issue 1.1, 6-Sep-05, Sec. 8, EMC part of PACS IMT Procedure - Contains description of “most sensitive” modes (e.g. for RS-Tests)

• HP-2-ASED-PR-0033, Sep-05, PLM EQM EMC Test Procedure - List of frequencies for RS-Tests

• Lessons learnt: Eventually modify RS-Test strategy to include pulsed tests and review list of frequencies


FM IST 22

About TB/TV test from HP-2-ASED-PL-0031: “A reduced IST sequence will be performed for the verification of the instruments functional performance”

“Shortened” IMT/IST procedure: total time ~41h

- FFT (10.6h) - SPT-SPEC (8.4h) - SPT-PHOT (4.5h) without cooler recycling- AOT Test (6.0h) without cooler recycling

- Redundant PACS Test (4.8h) - PACS/SPIRE Parallel Mode (6.75h)

PACS TB/TV Testing


FM IST 23

PACS AVM IST • Original purpose: “dry run = clear test procedures before going on FM”

• Available PACS Hardware:- DPU AVM 1/2 Boot SW has been upgraded to flight

version - SPU AVM, Boot SW flight representative- DMC EM, Boot SW flight representative- BOLC AVM + external power supply

• Limitations with respect to FM:- Cannot run FM OBSW (DMC FM has different

hardware)- Cannot run nominal IMT/IST procedures (no FPU and

simulation requires different commanding)

- No redundant systems- No FM MIB- Workaround solutions in analysis (mainly in OBSW)

• Basic Functional Test for PACS WE according to PACS-ME-TP-016, issue 1.3, section 5 (Duration 1h)